Q CELLS Comes Out on Top of Patent Invalidation Trial


Hanwha Q CELLS, a global solar technology company, has received a patent validity judgment in the patent invalidation trial for Q CELLS cell technology filed in China by LONGi Solar, a Chinese solar manufacturer.

LONGi Solar filed two invalidity proceedings against Q CELLS in July and August of 2019 in China’s Reexamination and Invalidation Department of the Patent Office, CNIPA, alleging that the company’s patents regarding high-efficiency silicon solar cells were invalid. The patent office recently ruled in favor of Q CELLS by upholding the validity of its patents. The patent office’s determination reaffirmed that Q CELLS’ intellectual property rights can be protected in China, a market where most of the global PERC cells are currently produced.

“This win is a truly valuable achievement given that Q CELLS’ exclusive technology has been recognized not only in the solar power sales markets but also in the production markets,” says Dr. Daniel Jeong, CTO of Q CELLS. “Q CELLS will continue to do its best to protect our intellectual property and continue to drive innovation while promoting sound competition for the solar industry.”

Based on the European equivalent of one of the two patents recently upheld by China’s patent office (‘971, equivalent European patent EP 2 220 689), Q CELLS has filed litigation against three companies – JinkoSolar GmbH, REC Solar EMEA GmbH and LONGi Solar Technologie GmbH –  in Germany for PERC patent infringements. 

In June, the regional court of Düsseldorf, Germany, decided that JinkoSolar, REC and LONGi Solar infringed Q CELLS’ patent. Appeal proceedings and parallel invalidation proceedings are pending. The first instance judgment is provisionally enforceable against provision of a security. Q CELLS provided that security and decided to enforce the judgment. Following the court ruling, sales of the infringing products in Germany and imports have been prohibited, and recall and destruction obligations have been imposed against the affected products distributed after Jan. 30, 2019. 

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